I haven't seen anything but all it is just a board covered with the "Steady Betty" material. You can buy the Steady Betty Ironing board Kits which contains the material in different sizes: 14 x 54, 18 x 60, 24 x 60. If you have a friend who has one you can look at how it is made, then figure out how much material you need and get one of the ironing board covers that suits your needs. It is light enough that I don't think the base is wood, maybe something like foam board
I believe that they have this material patented and I haven't seen any knockoffs - yet. I actually did get the ironing board cover and covered my big board with it. I love it, but it doesn't work really well for regular (clothes) ironing as things don't slip over and around easily.